Step 1: Start in a plank position with arms and legs long. Beginning in a solid plank is the key to proper form and good results in the Mountain Climber. At its heart, the Mountain Climber is a form of plank. Keep your abs pulled in and your body straight. Squeeze your glutes and pull your shoulders away from your ears
Step 2: Pull your right knee into your chest. As the knee draws to the chest, pull your abs in even tighter to be sure your body doesn’t sag or come out of its plank position.
Step 3: Quickly switch and pull the left knee in. At the same time you push your right leg back, pull your left knee in to the chest using the same form.
Step 4: Continue to switch knees. Pull the knees in right, left, right, left—always switching simultaneously so that you are using a “running” motion. As you begin to move more quickly be in constant awareness of your body position and be sure to keep a straight line in your spine and don’t let your head droop. Core body stability is crucial.
Step 5: Try doing 4 sets of 30 second Mountain Climbers
Look for more great ab exercises? Check out our full list of core workouts!